Conversion of Corn Cobs Waste into Activated Carbons for Adsorption of Heavy Metals from Minerals Processing Wastewater
International Journal of Environmental Protection and Policy
Volume 4, Issue 4, July 2016, Pages: 98-103
Received: Jun. 7, 2016; Accepted: Jun. 15, 2016; Published: Jun. 29, 2016
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William Buah, Minerals Engineering Department, University of Mines and Technology, Tarkwa, Ghana
Jennifer MacCarthy, Environmental and Safety Engineering Department, University of Mines and Technology, Tarkwa, Ghana
Samuel Ndur, Environmental and Safety Engineering Department, University of Mines and Technology, Tarkwa, Ghana
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This study investigated adsorption of Lead (Pb2+), Copper (Cu2+) and Cadmium (Cd2+) from minerals processing wastewater using activated carbons prepared from waste corn cobs. The activated carbons were prepared by carbonisation of the waste at 900°C to obtain carbonised corn cobs. Samples of the carbonised material were activated at 900°C for various durations using steam as an activating agent. The derived activated carbons were contacted with the wastewater containing heavy metals to assess their heavy metal removal abilities. From the results, up to 99.9%, 99.8 and 99.7% adsorption were attained for Pb2+, Cu2+ and Cd2+ respectively. This reduced the concentrations of Pb2+, Cu2+ and Cd2+ from 1.56 mg/L, 1.87 mg/L and 0.69 mg/L, respectively, to <0.002 mg/L for each metal ion. The results demonstrate that the derived activated carbons have the capacity to significantly reduce heavy metal concentrations to levels below the World Health Organisation (WHO) standards for safe drinking water.
Corn Cob, Activated Carbon, Heavy Metal, Wastewater and Adsorption
To cite this article
William Buah, Jennifer MacCarthy, Samuel Ndur, Conversion of Corn Cobs Waste into Activated Carbons for Adsorption of Heavy Metals from Minerals Processing Wastewater, International Journal of Environmental Protection and Policy. Vol. 4, No. 4, 2016, pp. 98-103. doi: 10.11648/j.ijepp.20160404.11
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